FIGURE 1.

The experimental design. This experiment contains four natural accessions of Arabidopsis thaliana and two treatments of control and salt stress. The experiment follows a block design, and each block contains one plant from each natural accession. Two blocks compose a layer in the growth room and are assigned randomly to control and salt stress treatments. Six layers contain six replicated plants for each treatment and accession, and three replicated plants were sampled for whole-genome bisulfite sequencing (WGBS).